Rack-and-pinion door-bolt.



No. 669,7l5. Patented Mar. l2, I901. H. G. VDIGHT.

BACK AND PINION 000R BOLT.

(Application Med Jan, 4, 1901.)

(No llmipl.)

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HENRY G. VOIGHT, OF NEWV BRITAIN, CONNECTICUT, ASSIGNOR TO THE RUSSELLAND ERWIN MANUFACTURING COMPANY, OF SAME PLACE.

RACK-AND-PINION DOOR-BOLT.

SPECIFICATION forming part of Letters Patent No. 669,715, dated March12, 1901.

Application filed January 4, 1901. Serial No. 42,113. (No model.)

To ctZl whom, it may concern;

Be it known that I, HENRY G. VOIGHT, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inRack-and-Pinion Door-Bolts, of which the following is a specification.

My invention relates to improvements in rack-aud-pinion door-bolts; andthe objects of my improvement are simplicity and economy in constructionand efliciency in use.

In the accompanying drawings, Figure 1 is a plan view of my door'bolt.Fig. 2 is a longitudinal section thereof on the line a: a; of Fig. 1.Fig. 3 is a plan view of the bolt without the case; and Fig. 4 is an endview of the same, showing the inner end.

The case A and the thumb-turn B, with its pinion-like shank 5, are of anold and wellknown form, and therefore need not be further described.

The bolt is formed of a plain cylindrical body 6 and a double rackconsisting of two separately-formed sheet-metal members 7. I prefer tosecure the rack members 7 to the body 6 by providing the inner end ofthe said body with slots 8, into which the ends of the rack members areplaced and secured by setting down the metal over their edge, as at 9,Fig. 3. The heels or extreme inner ends of the rack members are turnedoutwardly to form lateral wings 10 with rounded edges. They are slightlyseparated from each other to give a wider bearing for the pinion-likeshank 5 and are either bent a little or set so as to spread their wingedends when not within the case beyond the diameter of the said case. Wheninserted in the case, the winged ends are compressed together to bringthe racks substantially parallel to each other, but under tension,whereby the employment of special friction devices is renderedunnecessary. The pressure of the winged ends on the inside of the casewill cause the bolt to remain in whatever position it may be set, thesaid wings constituting a frictional device that is integral with therack.

The operation is the same as other bolts of this class, excepting that Iget a broad hearing for the pinion-like shank, in connection with asheet-metal rack formed separately from the bolt, and that the retainingfriction is produced by an integral part of the rack itself instead ofby a special friction device.

I claim as my invention- 1. In a rack-and-pinion door-bolt, thecombination of the cylindrical bolt-bod y with two separately-formedsheet-metal rack members secured thereto, and separated from each other,substantially as described.

2. In a rack-and-pinion door-bolt, the bolt having a double rack withoutwardly-extended friction-wings, substantially as described.

3. The combination of the case, with the thumb-turn having a pinion-likeshank, the bolt-body, and a rack provided with integral frictionaldevices held under tension by the said case, substantially as described.

HENRY G. VOIGI-IT.

Witnesses:

M. S. WIARD, W. E. WIGHTMAN.

